Z1OwnersClub GB

My z1100r seems to be running on the two outter coils but the inner coils dont seem to be getting any sark at all. I have put a pair of coils off my gpz1100 on and it's the same. I can't seem to trace back to how there's no power getting to the inner coils. If any one could help me this would be a massive high five. As this zed has been off the road for five years now. And I have had the bike for 20 years and help please???thank Vugz

check the red wires at the coils for 12 volts when ignition is on. if you have voltage at one coil but not the other you have a break in the wiring? if you have 12 volts at both red wires to the coils it is probably the pick up coil or the ic igniter

The ic igniter? Is that on the right side of the engine behind the small casing? another thing that I noticed when carbs were off is that the jets were 135 on right side looking down on carbs and 130 on the left. Is that normal?

Vugzed1100r wrote:The ic igniter? Is that on the right side of the engine behind the small casing? another thing that I noticed when carbs were off is that the jets were 135 on right side looking down on carbs and 130 on the left. Is that normal?

No, they are the pulsar (pick up) coils. The IC igniter will be a black box, usually fixed to RH side of the battery box.
Follow the pulsar coil wires from the RH cover, these will lead to the IC igniter box.
I've been working on bike electrics for many years, and I would suggest one of your pulsar coils has gone down. Disconnect the 4-pin connector from the pulsar coils to the IC igniter box and check the resistance of both pulsar coils.
Pulsar coil for Cyl 1&4: Black and Blue wires
Pulsar coil for Cyl 2&3: Yellow and Red wires
(Note... these wire colours are for a Z1000J, same year so should be right).
Resistance should be between 376 and 564 ohms.

Another electrical issue usually overlooked are NGK spark plug caps. These have built in resistors and can break down over time and give misfires.

If Dyna (high output) coils have been fitted at any time using NGK caps then the resistors will definitely be shagged and no spark, though as you have tried another good coil I doubt this is your problem.

The jet sizes should not be biased on any one side. Fit the standard size jets to all 4 carbs.

Hope this helps... Will

As above but if you have two different sizes then place the larger ones in the inboard cylinders until you can get 4 the same.
Its not uncommon to have slightly larger jetting in the two inboard cylinders as they tend to run hotter and therefore leaner and the excess fuel cools them a little. (in theory!)

There is a +- 10% difference in flow rate as standard with genuine mikuni jets so without measuring the flow rate (easy enough to mock up a water bottle and tube) of each jet you may find that they are not that dissimilar particularly if they are older.

AL